Experimental observation of a coherently induced transparency on a blue probe in a doppler-broadened mismatched v-type system
TL;DR: In this paper, an experimental observation of transparency on a transition in the blue spectral region, induced by a continuous-wave infrared coupling field in a Doppler-broadened medium, is presented.
Abstract: An experimental observation of transparency on a transition in the blue spectral region, induced by a continuous-wave (cw) infrared coupling field in a Doppler-broadened medium, is presented. This experimental result is supported by extensive theoretical modeling of the system, a V-type scheme in atomic rubidium vapor. Transparency is observed by a 422-nm probe field on the transition between the hyperfine split ground state ${5S}_{1/2}$ and the excited state ${6P}_{1/2}.$ The coupling laser is employed on the linked transition ${5S}_{1/2}{\ensuremath{-}5P}_{3/2},$ inducing significant levels of transparency $(g70%)$ nondissipatively and in the absence of optical pumping effects.
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TL;DR: In this article, the main motivation in inversionless lasing research was discussed, namely, the generation of short-wavelength laser light, and the basic physics of LWI in two-level and, eventually, in three-and multilevel atomic configurations.
Abstract: This review paper is devoted to amplification and lasing without population inversion involving atomic transitions in gas media. We start by discussing the main motivation in inversionless lasing research, namely, the generation of short-wavelength laser light. Then, we review the basic physics of inversionless lasing in two-level and, eventually, in three- and multilevel atomic configurations. Finally, we summarize the current state of the art of LWI experiments and indicate the main difficulties with respect to short-wavelength laser generation.
258 citations
Cites background from "Experimental observation of a coher..."
...Theoretically, it has been shown for the optical domain that a vapour cell can support LWI up to probe(lasing)-to-driving frequency ratios of the order of R ∼ 2 [93, 94, 96]....
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TL;DR: Electromagnetically induced transparency is observed in a mismatched-wavelength cascade system with a room-temperature rubidium vapor cell and the ratio of the observed Rabi frequencies for coupling to the 5P(3/2) ?
Abstract: Electromagnetically induced transparency is observed in a
mismatched-wavelength cascade system with a room-temperature rubidium
vapor cell. A cw probe laser beam monitors the
5S1/2 →
5P3/2 transition while another cw laser
couples the 5P3/2 state to a higher
excited state. The ratio of the observed Rabi frequencies for
coupling to the 5P3/2 →
8D3/2,5/2 transitions agrees
well with that predicted by use of the transition oscillator
strengths. Optical switching is demonstrated with an 80-mW coupling
laser beam modulated up to 1 MHz.
58 citations
TL;DR: In this article, the authors studied the nonlinear behavior of an electromagnetically induced transparency EIT resonance subject to a coherent driving field and showed that the doublet splitting originates from the rf-field induced dynamic Stark effect and has close analogy with the Autler-Townes effect observed in three-level pump-probe spectroscopy study.
Abstract: In this paper we study the nonlinear behavior of an electromagnetically induced transparency EIT resonance subject to a coherent driving field. The EIT is associated with a three-level system where two hyperfine levels within an electronic ground state are coupled to a common excited state level by a coupling field and a probe field. In addition there is an radio-frequency rf field driving a hyperfine transition within the ground state. The paper contrasts two different situations. In one case the rf-driven transition shares a common level with the probed transition and in the second case it shares a common level with the coupled transition. In both cases the EIT resonance is split into a doublet and the characteristics of the EIT doublet are determined by the strength and frequency of the rf-driving field. The doublet splitting originates from the rf-field induced dynamic Stark effect and has close analogy with the Autler-Townes effect observed in three-level pump-probe spectroscopy study. The situation changes when the rf field is strong and the two cases are very different. One is analogous to two three-level systems with EIT resonance associated with each. The other corresponds to a doubly driven three-level system with rf-field-induced electromagnetically induced absorption resonance. The two situations are modeled using numerical solutions of the relevant equation of motion of density matrix. In addition a physical account of their behaviors is given in terms of a dressed state picture.
55 citations
TL;DR: In this paper, a sharp transparency feature is induced in an allowed electron spin resonance (ESR) transition by driving a nominally spin-forbidden transition, which is interpreted as being associated with electromagnetically induced transparency (EIT).
Abstract: A sharp transparency feature is induced in an allowed electron spin resonance (ESR) transition by driving a nominally spin-forbidden transition. The width of the feature is narrower than the homogeneous linewidth of the ESR transition and is interpreted as being associated with electromagnetically induced transparency (EIT). Measurements are made for the nitrogen-vacancy centre in diamond and the signals are detected using a coherent optical technique.
36 citations
TL;DR: In this paper, the effect of Er 3+ concentration on electromagnetically induced transparency in two types of three-level schemes (the ladder and the Λ model) was studied.
31 citations